/* * $Id$ */ /* * The Harbour virtual machine * Copyright(C) 1999 by Antonio Linares. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR * PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to: * * The Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. * * You can contact me at: alinares@fivetech.com */ #include #ifndef __MPW__ #include #endif #include #include #include #include #include "hbsetup.h" /* main configuration file */ #include "extend.h" #include "errorapi.h" #include "itemapi.h" #include "pcode.h" #include "set.h" #include "inkey.h" extern void hb_consoleInitialize( void ); extern void hb_consoleRelease( void ); extern void ReleaseClasses( void ); /* releases all defined classes */ extern void InitSymbolTable( void ); /* initialization of runtime support symbols */ extern ULONG ulMemoryBlocks; /* memory blocks used */ extern ULONG ulMemoryMaxBlocks; /* maximum number of used memory blocks */ extern ULONG ulMemoryConsumed; /* memory size consumed */ extern ULONG ulMemoryMaxConsumed; /* memory max size consumed */ typedef struct _SYMBOLS { PSYMBOL pModuleSymbols; /* pointer to a one module own symbol table */ WORD wModuleSymbols; /* number of symbols on that table */ struct _SYMBOLS * pNext;/* pointer to the next SYMBOLS structure */ SYMBOLSCOPE hScope; /* scope collected from all symbols in module used to speed initialization code */ } SYMBOLS, * PSYMBOLS; /* structure to keep track of all modules symbol tables */ HARBOUR HB_ERRORSYS( void ); HARBOUR HB_ERRORNEW( void ); HARBOUR HB_EVAL( void ); /* Evaluates a codeblock from Harbour */ HARBOUR HB_MAIN( void ); /* fixed entry point by now */ HARBOUR HB_VALTYPE( void ); /* returns a string description of a value */ /* currently supported virtual machine actions */ void And( void ); /* performs the logical AND on the latest two values, removes them and leaves result on the stack */ void ArrayAt( void ); /* pushes an array element to the stack, removing the array and the index from the stack */ void ArrayPut( void ); /* sets an array value and pushes the value on to the stack */ void Dec( void ); /* decrements the latest numeric value on the stack */ void Div( void ); /* divides the latest two values on the stack, removes them and leaves the result */ void Do( WORD WParams ); /* invoke the virtual machine */ HARBOUR DoBlock( void ); /* executes a codeblock */ void Duplicate( void ); /* duplicates the latest value on the stack */ void DuplTwo( void ); /* duplicates the latest two value on the stack */ void EndBlock( void ); /* copies the last codeblock pushed value into the return value */ void Equal( BOOL bExact ); /* checks if the two latest values on the stack are equal, removes both and leaves result */ void ForTest( void ); /* test for end condition of for */ void Frame( BYTE bLocals, BYTE bParams ); /* increases the stack pointer for the amount of locals and params suplied */ void FuncPtr( void ); /* pushes a function address pointer. Removes the symbol from the satck */ void Function( WORD wParams ); /* executes a function saving its result */ void GenArray( WORD wElements ); /* generates a wElements Array and fills it from the stack values */ void Greater( void ); /* checks if the latest - 1 value is greater than the latest, removes both and leaves result */ void GreaterEqual( void ); /* checks if the latest - 1 value is greater than or equal the latest, removes both and leaves result */ void Inc( void ); /* increment the latest numeric value on the stack */ void Instring( void ); /* check whether string 1 is contained in string 2 */ void Less( void ); /* checks if the latest - 1 value is less than the latest, removes both and leaves result */ void LessEqual( void ); /* checks if the latest - 1 value is less than or equal the latest, removes both and leaves result */ void Message( PSYMBOL pSymMsg ); /* sends a message to an object */ void Minus( void ); /* substracts the latest two values on the stack, removes them and leaves the result */ void Modulus( void ); /* calculates the modulus of latest two values on the stack, removes them and leaves the result */ void Mult( void ); /* multiplies the latest two values on the stack, removes them and leaves the result */ void Negate( void ); /* negates (-) the latest value on the stack */ void Not( void ); /* changes the latest logical value on the stack */ void NotEqual( void ); /* checks if the two latest values on the stack are not equal, removes both and leaves result */ void OperatorCall( PHB_ITEM, PHB_ITEM, char *); /* call an overloaded operator */ void Or( void ); /* performs the logical OR on the latest two values, removes them and leaves result on the stack */ void Plus( void ); /* sums the latest two values on the stack, removes them and leaves the result */ long PopDate( void ); /* pops the stack latest value and returns its date value as a LONG */ void PopDefStat( WORD wStatic ); /* pops the stack latest value onto a static as default init */ double PopDouble( WORD * ); /* pops the stack latest value and returns its double numeric format value */ void PopLocal( SHORT wLocal ); /* pops the stack latest value onto a local */ int PopLogical( void ); /* pops the stack latest value and returns its logical value */ void PopMemvar( PSYMBOL ); /* pops a value of memvar variable */ double PopNumber( void ); /* pops the stack latest value and returns its numeric value */ void PopParameter( PSYMBOL, BYTE ); /* creates a PRIVATE variable and sets it with parameter's value */ void PopStatic( WORD wStatic ); /* pops the stack latest value onto a static */ void Power( void ); /* power the latest two values on the stack, removes them and leaves the result */ void Push( PHB_ITEM pItem ); /* pushes a generic item onto the stack */ void PushBlock( BYTE * pCode, PSYMBOL pSymbols ); /* creates a codeblock */ void PushDate( LONG lDate ); /* pushes a long date onto the stack */ void PushDouble( double lNumber, WORD wDec ); /* pushes a double number onto the stack */ void PushLocal( SHORT iLocal ); /* pushes the containts of a local onto the stack */ void PushLocalByRef( SHORT iLocal ); /* pushes a local by refrence onto the stack */ void PushLogical( int iTrueFalse ); /* pushes a logical value onto the stack */ void PushLong( long lNumber ); /* pushes a long number onto the stack */ void PushMemvar( PSYMBOL ); /* pushes a value of memvar variable */ void PushMemvarByRef( PSYMBOL ); /* pushes a reference to a memvar variable */ void PushNil( void ); /* in this case it places nil at self */ void PushNumber( double dNumber, WORD wDec ); /* pushes a number on to the stack and decides if it is integer, long or double */ void PushStatic( WORD wStatic ); /* pushes the containts of a static onto the stack */ void PushStaticByRef( WORD iLocal ); /* pushes a static by refrence onto the stack */ void PushString( char * szText, ULONG length ); /* pushes a string on to the stack */ void PushSymbol( PSYMBOL pSym ); /* pushes a function pointer onto the stack */ void PushInteger( int iNumber ); /* pushes a integer number onto the stack */ void RetValue( void ); /* pops the latest stack value into stack.Return */ void SFrame( PSYMBOL pSym ); /* sets the statics frame for a function */ void Statics( PSYMBOL pSym ); /* increases the the global statics array to hold a PRG statics */ void ProcessSymbols( PSYMBOL pSymbols, WORD wSymbols ); /* statics symbols initialization */ void DoInitStatics( void ); /* executes all _INITSTATICS functions */ void DoInitFunctions( int argc, char * argv[] ); /* executes all defined PRGs INIT functions */ void DoExitFunctions( void ); /* executes all defined PRGs EXIT functions */ void ReleaseLocalSymbols( void ); /* releases the memory of the local symbols linked list */ #ifdef HARBOUR_OBJ_GENERATION void ProcessObjSymbols ( void ); /* process Harbour generated OBJ symbols */ typedef struct { WORD wSymbols; /* module local symbol table symbols amount */ PSYMBOL pSymbols; /* module local symbol table address */ } OBJSYMBOLS, * POBJSYMBOLS; /* structure used from Harbour generated OBJs */ #ifdef __cplusplus extern "C" POBJSYMBOLS HB_FIRSTSYMBOL, HB_LASTSYMBOL; #else extern POBJSYMBOLS HB_FIRSTSYMBOL, HB_LASTSYMBOL; #endif #endif /* stack management functions */ void StackDec( void ); /* pops an item from the stack without clearing it's contents */ void StackPop( void ); /* pops an item from the stack */ void StackFree( void ); /* releases all memory used by the stack */ void StackPush( void ); /* pushes an item on to the stack */ void StackInit( void ); /* initializes the stack */ void StackShow( void ); /* show the types of the items on the stack for debugging purposes */ static void ForceLink( void ); #define STACK_INITHB_ITEMS 100 #define STACK_EXPANDHB_ITEMS 20 int iHB_DEBUG = 0; /* if 1 traces the virtual machine activity */ STACK stack; SYMBOL symEval = { "__EVAL", FS_PUBLIC, DoBlock, 0 }; /* symbol to evaluate codeblocks */ PSYMBOL pSymStart; /* start symbol of the application. MAIN() is not required */ HB_ITEM aStatics; /* Harbour array to hold all application statics variables */ HB_ITEM errorBlock; /* errorblock */ PSYMBOLS pSymbols = 0; /* to hold a linked list of all different modules symbol tables */ BOOL bQuit = FALSE; /* inmediately exit the application */ BYTE bErrorLevel = 0; /* application exit errorlevel */ #define HB_DEBUG( x ) if( iHB_DEBUG ) printf( x ) #define HB_DEBUG2( x, y ) if( iHB_DEBUG ) printf( x, y ) /* application entry point */ int main( int argc, char * argv[] ) { int i; void ( * DontDiscardForceLink )( void ) = &ForceLink; if( ! DontDiscardForceLink ) /* just to avoid warnings from the C compiler */ iHB_DEBUG += ( int ) DontDiscardForceLink; /* just to avoid warnings from the C compiler */ HB_DEBUG( "main\n" ); /* initialize internal data structures */ aStatics.type = IT_NIL; errorBlock.type = IT_NIL; stack.Return.type = IT_NIL; StackInit(); hb_NewDynSym( &symEval ); /* initialize dynamic symbol for evaluating codeblocks */ hb_setInitialize(); /* initialize Sets */ hb_consoleInitialize(); /* initialize Console */ hb_MemvarsInit(); #ifdef HARBOUR_OBJ_GENERATION ProcessObjSymbols(); /* initialize Harbour generated OBJs symbols */ #endif /* Initialize symbol table with runtime support functions */ InitSymbolTable(); /* Call functions that initializes static variables * Static variables have to be initialized before any INIT functions * because INIT function can use static variables */ DoInitStatics(); DoInitFunctions( argc, argv ); /* process defined INIT functions */ #ifdef HARBOUR_START_PROCEDURE { PDYNSYM pDynSym =hb_FindDynSym( HARBOUR_START_PROCEDURE ); if( pDynSym ) pSymStart =pDynSym->pSymbol; else { printf( "Can\'t locate the starting procedure: \'%s\'", HARBOUR_START_PROCEDURE ); exit(1); } } #endif PushSymbol( pSymStart ); /* pushes first FS_PUBLIC defined symbol to the stack */ PushNil(); /* places NIL at self */ for( i = 1; i < argc; i++ ) /* places application parameters on the stack */ PushString( argv[ i ], strlen( argv[ i ] ) ); Do( argc - 1 ); /* invoke it with number of supplied parameters */ DoExitFunctions(); /* process defined EXIT functions */ hb_itemClear( &stack.Return ); hb_arrayRelease( &aStatics ); hb_itemClear( &errorBlock ); ReleaseClasses(); ReleaseLocalSymbols(); /* releases the local modules linked list */ hb_ReleaseDynSym(); /* releases the dynamic symbol table */ hb_consoleRelease(); /* releases Console */ hb_setRelease(); /* releases Sets */ hb_MemvarsRelease(); StackFree(); /* hb_LogDynSym(); */ HB_DEBUG( "Done!\n" ); if( ulMemoryBlocks ) { printf( "\n\ntotal memory blocks allocated: %lu\n", ulMemoryMaxBlocks ); printf( "memory maximum size consumed: %ld\n", ulMemoryMaxConsumed ); printf( "memory blocks not released: %ld\n", ulMemoryBlocks ); printf( "memory size not released: %ld\n", ulMemoryConsumed ); } return bErrorLevel; } void VirtualMachine( PBYTE pCode, PSYMBOL pSymbols ) { BYTE bCode; WORD w = 0, wParams, wSize; ULONG ulPrivateBase = hb_MemvarGetPrivatesBase(); HB_DEBUG( "VirtualMachine\n" ); while( ( bCode = pCode[ w ] ) != HB_P_ENDPROC && ! bQuit ) { hb_inkeyPoll(); /* Poll the console keyboard */ switch( bCode ) { case HB_P_AND: And(); w++; break; case HB_P_ARRAYAT: ArrayAt(); w++; break; case HB_P_ARRAYPUT: ArrayPut(); w++; break; case HB_P_DEC: Dec(); w++; break; case HB_P_DIVIDE: Div(); w++; break; case HB_P_DO: Do( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_DUPLICATE: Duplicate(); w++; break; case HB_P_DUPLTWO: DuplTwo(); w++; break; case HB_P_ENDBLOCK: EndBlock(); HB_DEBUG( "EndProc\n" ); return; /* end of a codeblock - stop evaluation */ case HB_P_EQUAL: Equal( FALSE ); w++; break; case HB_P_EXACTLYEQUAL: Equal( TRUE ); w++; break; case HB_P_FALSE: PushLogical( 0 ); w++; break; case HB_P_FORTEST: ForTest(); w++; break; case HB_P_FRAME: Frame( pCode[ w + 1 ], pCode[ w + 2 ] ); w += 3; break; case HB_P_FUNCPTR: FuncPtr(); w++; break; case HB_P_FUNCTION: Function( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_GENARRAY: GenArray( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_GREATER: Greater(); w++; break; case HB_P_GREATEREQUAL: GreaterEqual(); w++; break; case HB_P_INC: Inc(); w++; break; case HB_P_INSTRING: Instring(); w++; break; case HB_P_JUMP: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); if( wParams ) w += wParams; else w += 3; break; case HB_P_JUMPFALSE: if( ! PopLogical() ) w += pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); else w += 3; break; case HB_P_JUMPTRUE: if( PopLogical() ) w += pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); else w += 3; break; case HB_P_LESS: Less(); w++; break; case HB_P_LESSEQUAL: LessEqual(); w++; break; case HB_P_LINE: stack.pBase->item.asSymbol.lineno = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); w += 3; break; case HB_P_MESSAGE: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); Message( pSymbols + wParams ); w += 3; break; case HB_P_MINUS: Minus(); w++; break; case HB_P_MODULUS: Modulus(); w++; break; case HB_P_MULT: Mult(); w++; break; case HB_P_NEGATE: Negate(); w++; break; case HB_P_NOT: Not(); w++; break; case HB_P_NOTEQUAL: NotEqual(); w++; break; case HB_P_OR: Or(); w++; break; case HB_P_PARAMETER: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); PopParameter( pSymbols + wParams, pCode[ w+3 ] ); w +=4; break; case HB_P_PLUS: Plus(); w++; break; case HB_P_POP: StackPop(); w++; break; case HB_P_POPLOCAL: PopLocal( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_POPMEMVAR: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); PopMemvar( pSymbols + wParams ); w += 3; break; case HB_P_POPSTATIC: PopStatic( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_POWER: Power(); w++; break; case HB_P_PUSHBLOCK: /* +0 -> _pushblock * +1 +2 -> size of codeblock * +3 +4 -> number of expected parameters * +5 +6 -> number of referenced local variables * +7 -> start of table with referenced local variables */ PushBlock( pCode + w, pSymbols ); w += (pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 )); break; case HB_P_PUSHDOUBLE: PushDouble( * ( double * ) ( &pCode[ w + 1 ] ), ( WORD ) * ( BYTE * ) &pCode[ w + 1 + sizeof( double ) ] ); w += 1 + sizeof( double ) + 1; break; case HB_P_PUSHINT: PushInteger( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_PUSHLOCAL: PushLocal( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_PUSHLOCALREF: PushLocalByRef( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_PUSHLONG: PushLong( * ( long * ) ( &pCode[ w + 1 ] ) ); w += 5; break; case HB_P_PUSHMEMVAR: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); PushMemvar( pSymbols + wParams ); w += 3; break; case HB_P_PUSHMEMVARREF: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); PushMemvarByRef( pSymbols + wParams ); w += 3; break; case HB_P_PUSHNIL: PushNil(); w++; break; case HB_P_PUSHSELF: Push( stack.pBase + 1 ); w++; break; case HB_P_PUSHSTATIC: PushStatic( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_PUSHSTATICREF: PushStaticByRef( pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ) ); w += 3; break; case HB_P_PUSHSTR: wSize = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); PushString( (char*)pCode + w + 3, wSize ); w += ( wSize + 3 ); break; case HB_P_PUSHSYM: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); PushSymbol( pSymbols + wParams ); w += 3; break; case HB_P_RETVALUE: RetValue(); w++; break; case HB_P_SFRAME: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); SFrame( pSymbols + wParams ); w += 3; break; case HB_P_STATICS: wParams = pCode[ w + 1 ] + ( pCode[ w + 2 ] * 256 ); Statics( pSymbols + wParams ); w += 3; break; case HB_P_TRUE: PushLogical( 1 ); w++; break; case HB_P_ZERO: PushInteger( 0 ); w++; break; case HB_P_NOOP: /* Intentionally do nothing */ break; default: printf( "The Harbour virtual machine can't run yet this PRG\n(unsuported pcode opcode: %i)\n", bCode ); printf( "Line number %i in %s", stack.pBase->item.asSymbol.lineno, stack.pBase->item.asSymbol.value->szName ); exit( 1 ); break; } } hb_MemvarSetPrivatesBase( ulPrivateBase ); HB_DEBUG( "EndProc\n" ); } void And( void ) { PHB_ITEM pItem2 = stack.pPos - 1; PHB_ITEM pItem1 = stack.pPos - 2; int iResult; HB_DEBUG( "And\n" ); if( IS_LOGICAL( pItem1 ) && IS_LOGICAL( pItem2 ) ) { iResult = pItem1->item.asLogical.value && pItem2->item.asLogical.value; StackPop(); StackPop(); PushLogical( iResult ); } else { hb_errorRT_BASE(EG_ARG, 1078, NULL, ".AND."); } } void ArrayAt( void ) { double dIndex = PopNumber(); PHB_ITEM pArray = stack.pPos - 1; HB_ITEM item; hb_arrayGet( pArray, dIndex, &item ); StackPop(); hb_itemCopy( stack.pPos, &item ); hb_itemClear( &item ); StackPush(); } void ArrayPut( void ) { PHB_ITEM pValue = stack.pPos - 1; PHB_ITEM pIndex = stack.pPos - 2; PHB_ITEM pArray = stack.pPos - 3; ULONG ulIndex; if( IS_INTEGER( pIndex ) ) ulIndex = pIndex->item.asInteger.value; else if( IS_LONG( pIndex ) ) ulIndex = pIndex->item.asLong.value; else if( IS_DOUBLE( pIndex ) ) ulIndex = pIndex->item.asDouble.value; else ; /* QUESTION: Should we raise an error here ? */ hb_arraySet( pArray, ulIndex, pValue ); hb_itemCopy( pArray, pValue ); /* places pValue at pArray position */ StackPop(); StackPop(); } void Dec( void ) { double dNumber; LONG lDate; WORD wDec; if( IS_NUMERIC( stack.pPos - 1 ) ) { dNumber = PopDouble( &wDec ); PushNumber( --dNumber, wDec ); } else if( IS_DATE( stack.pPos - 1 ) ) { lDate = PopDate(); PushDate( --lDate ); /* TOFIX: Dates should decreased other way */ } /* TODO: Should we check other types here and issue an error ? */ } void Div( void ) { WORD wDec1, wDec2; double d2 = PopDouble( &wDec2 ); double d1 = PopDouble( &wDec1 ); /* NOTE: Clipper always returns the result of a division with the SET number of decimal places. */ PushNumber( d1 / d2, hb_set.HB_SET_DECIMALS ); } void Do( WORD wParams ) { PHB_ITEM pItem = stack.pPos - wParams - 2; /* procedure name */ PSYMBOL pSym = pItem->item.asSymbol.value; LONG wStackBase = stack.pBase - stack.pItems; /* as the stack memory block could change */ LONG wItemIndex = pItem - stack.pItems; PHB_ITEM pSelf = stack.pPos - wParams - 1; /* NIL, OBJECT or BLOCK */ PHB_FUNC pFunc; int iStatics = stack.iStatics; /* Return iStatics position */ if( ! IS_SYMBOL( pItem ) ) { StackShow(); printf( "symbol item expected as a base from Do() in line %i\n", stack.pBase->item.asSymbol.lineno ); exit( 1 ); } /* if( ! IS_NIL( pSelf ) ) { StackShow(); printf( "invalid symbol type for self from Do()\n" ); exit( 1 ); } */ pItem->item.asSymbol.lineno = 0; pItem->item.asSymbol.paramcnt = wParams; stack.pBase = stack.pItems + pItem->item.asSymbol.stackbase; pItem->item.asSymbol.stackbase = wStackBase; HB_DEBUG2( "Do with %i params\n", wParams ); if( ! IS_NIL( pSelf ) ) /* are we sending a message ? */ { if( pSym == &( symEval ) && IS_BLOCK( pSelf ) ) pFunc = pSym->pFunPtr; /* __EVAL method = function */ else pFunc = hb_GetMethod( pSelf, pSym ); if( ! pFunc ) { printf( "error: message %s not implemented for class %s\n", pSym->szName, hb_GetClassName( pSelf ) ); exit( 1 ); } pFunc(); } else /* it is a function */ { pFunc = pSym->pFunPtr; if( ! pFunc ) { printf( "error: invalid function pointer (%s) from Do() in line %i\n", pSym->szName, stack.pBase->item.asSymbol.lineno ); exit( 1 ); } pFunc(); } while( stack.pPos > stack.pItems + wItemIndex ) StackPop(); stack.pBase = stack.pItems + wStackBase; stack.iStatics = iStatics; } HARBOUR DoBlock( void ) { PHB_ITEM pBlock = stack.pBase + 1; WORD wStackBase = stack.pBase - stack.pItems; /* as the stack memory block could change */ int iParam; if( ! IS_BLOCK( pBlock ) ) { printf( "error: codeblock expected from DoBlock() in line %i\n", stack.pBase->item.asSymbol.lineno ); exit( 1 ); } /* Check for valid count of parameters */ iParam =pBlock->item.asBlock.paramcnt -hb_pcount(); /* add missing parameters */ while( iParam-- > 0 ) PushNil(); /* set pBaseCB to point to local variables of a function where * the codeblock was defined */ stack.pBase->item.asSymbol.lineno =pBlock->item.asBlock.lineno; hb_CodeblockEvaluate( pBlock ); /* restore stack pointers */ stack.pBase = stack.pItems + wStackBase; HB_DEBUG( "End of DoBlock\n" ); } void Duplicate( void ) { hb_itemCopy( stack.pPos, stack.pPos - 1 ); StackPush(); } void DuplTwo( void ) { hb_itemCopy( stack.pPos, stack.pPos - 2 ); StackPush(); hb_itemCopy( stack.pPos, stack.pPos - 2 ); StackPush(); } HARBOUR HB_EVAL( void ) { PHB_ITEM pBlock = hb_param( 1, IT_BLOCK ); if( pBlock ) { WORD w; PushSymbol( &symEval ); Push( pBlock ); for( w = 2; w <= hb_pcount(); w++ ) Push( hb_param( w, IT_ANY ) ); Do( hb_pcount() - 1 ); } else { printf( "Not a valid codeblock on eval in line %i\n", stack.pBase->item.asSymbol.lineno ); exit( 1 ); } } void EndBlock( void ) { StackDec(); /* make the last item visible */ hb_itemCopy( &stack.Return, stack.pPos ); /* copy it */ hb_itemClear( stack.pPos ); /* and now clear it */ HB_DEBUG( "EndBlock\n" ); } void Equal( BOOL bExact ) { PHB_ITEM pItem2 = stack.pPos - 1; PHB_ITEM pItem1 = stack.pPos - 2; int i; WORD wDec; if( IS_NIL( pItem1 ) && IS_NIL( pItem2 ) ) { StackPop(); StackPop(); PushLogical( 1 ); } else if ( IS_NIL( pItem1 ) || IS_NIL( pItem2 ) ) { StackPop(); StackPop(); PushLogical( 0 ); } else if( IS_STRING( pItem1 ) && IS_STRING( pItem2 ) ) { i = hb_itemStrCmp( pItem1, pItem2, bExact ); StackPop(); StackPop(); PushLogical( i == 0 ); } else if( IS_LOGICAL( pItem1 ) && IS_LOGICAL( pItem2 ) ) PushLogical( PopLogical() == PopLogical() ); else if( IS_NUMERIC( pItem1 ) && IS_NUMERIC( pItem2 ) ) PushLogical( PopDouble(&wDec) == PopDouble(&wDec) ); else if( IS_OBJECT( pItem1 ) && hb_isMessage( pItem1, "==" ) ) OperatorCall( pItem1, pItem2, "==" ); else if( pItem1->type != pItem2->type ) { hb_errorRT_BASE(EG_ARG, 1070, NULL, "=="); } else PushLogical( 0 ); } static void ForceLink( void ) /* To force the link of some functions */ { HB_ERRORSYS(); HB_ERRORNEW(); } void ForTest( void ) /* Test to check the end point of the FOR */ { double dStep; int iEqual; if( IS_NUMERIC( stack.pPos - 1 ) ) { WORD wDec; dStep = PopDouble( &wDec ); if( dStep > 0 ) /* Positive loop. Use LESS */ Less(); else if( dStep < 0 ) /* Negative loop. Use GREATER */ Greater(); else printf( "step of zero will cause endless loop" ); /* Add some break code or so... */ iEqual = PopLogical(); /* Logical should be on top of stack */ PushNumber( dStep, wDec ); /* Push the step expression back on the stack */ PushLogical( iEqual ); } else printf( "step expression should be numerical" ); } void Frame( BYTE bLocals, BYTE bParams ) { int i, iTotal = bLocals + bParams; HB_DEBUG( "Frame\n" ); if( iTotal ) for( i = 0; i < ( iTotal - stack.pBase->item.asSymbol.paramcnt ); i++ ) PushNil(); } void FuncPtr( void ) /* pushes a function address pointer. Removes the symbol from the satck */ { PHB_ITEM pItem = stack.pPos - 1; if( IS_SYMBOL( pItem ) ) { StackPop(); PushLong( ( ULONG ) pItem->item.asSymbol.value->pFunPtr ); } else { printf( "symbol item expected from FuncPtr()\n" ); exit( 1 ); } } void Function( WORD wParams ) { Do( wParams ); hb_itemCopy( stack.pPos, &stack.Return ); StackPush(); } void GenArray( WORD wElements ) /* generates a wElements Array and fills it from the stack values */ { HB_ITEM itArray; WORD w; itArray.type = IT_NIL; hb_arrayNew( &itArray, wElements ); for( w = 0; w < wElements; w++ ) hb_itemCopy( itArray.item.asArray.value->pItems + w, stack.pPos - wElements + w ); for( w = 0; w < wElements; w++ ) StackPop(); hb_itemCopy( stack.pPos, &itArray ); hb_itemClear( &itArray ); StackPush(); } void Greater( void ) { double dNumber1, dNumber2; LONG lDate1, lDate2; int i; int iLogical1, iLogical2; if( IS_STRING( stack.pPos - 2 ) && IS_STRING( stack.pPos - 1 ) ) { i = hb_itemStrCmp( stack.pPos - 2, stack.pPos - 1, FALSE ); StackPop(); StackPop(); PushLogical( i > 0 ); } else if( IS_NUMERIC( stack.pPos - 1 ) && IS_NUMERIC( stack.pPos - 2 ) ) { dNumber2 = PopNumber(); dNumber1 = PopNumber(); PushLogical( dNumber1 > dNumber2 ); } else if( IS_DATE( stack.pPos - 1 ) && IS_DATE( stack.pPos - 2 ) ) { lDate2 = PopDate(); lDate1 = PopDate(); PushLogical( lDate1 > lDate2 ); } else if( IS_LOGICAL( stack.pPos - 1 ) && IS_LOGICAL( stack.pPos -2 ) ) { iLogical1 = PopLogical(); iLogical2 = PopLogical(); PushLogical( iLogical1 > iLogical2 ); } else if( IS_OBJECT( stack.pPos - 2 ) && hb_isMessage( stack.pPos - 2, ">" ) ) OperatorCall( stack.pPos - 2, stack.pPos - 1, ">" ); else if( ( stack.pPos - 2 )->type != ( stack.pPos - 1 )->type ) { hb_errorRT_BASE(EG_ARG, 1075, NULL, ">"); } } void GreaterEqual( void ) { double dNumber1, dNumber2; LONG lDate1, lDate2; int i; int iLogical1, iLogical2; if( IS_STRING( stack.pPos - 2 ) && IS_STRING( stack.pPos - 1 ) ) { i = hb_itemStrCmp( stack.pPos - 2, stack.pPos - 1, FALSE ); StackPop(); StackPop(); PushLogical( i >= 0 ); } else if( IS_NUMERIC( stack.pPos - 1 ) && IS_NUMERIC( stack.pPos - 2 ) ) { dNumber2 = PopNumber(); dNumber1 = PopNumber(); PushLogical( dNumber1 >= dNumber2 ); } else if( IS_DATE( stack.pPos - 1 ) && IS_DATE( stack.pPos - 2 ) ) { lDate2 = PopDate(); lDate1 = PopDate(); PushLogical( lDate1 >= lDate2 ); } else if( IS_LOGICAL( stack.pPos - 1 ) && IS_LOGICAL( stack.pPos -2 ) ) { iLogical1 = PopLogical(); iLogical2 = PopLogical(); PushLogical( iLogical1 >= iLogical2 ); } else if( IS_OBJECT( stack.pPos - 2 ) && hb_isMessage( stack.pPos - 2, ">=" ) ) OperatorCall( stack.pPos - 2, stack.pPos - 1, ">=" ); else if( ( stack.pPos - 2 )->type != ( stack.pPos - 1 )->type ) { hb_errorRT_BASE(EG_ARG, 1076, NULL, ">="); } } void Inc( void ) { double dNumber; LONG lDate; WORD wDec; if( IS_NUMERIC( stack.pPos - 1 ) ) { dNumber = PopDouble( &wDec ); PushNumber( ++dNumber, wDec ); } else if( IS_DATE( stack.pPos - 1 ) ) { lDate = PopDate(); PushDate( ++lDate ); } else { hb_errorRT_BASE(EG_ARG, 1086, NULL, "++"); } } void Instring( void ) { PHB_ITEM pItem1 = stack.pPos - 2; PHB_ITEM pItem2 = stack.pPos - 1; int iResult; if( IS_STRING( pItem1 ) && IS_STRING( pItem2 ) ) { iResult = hb_strAt( pItem1->item.asString.value, pItem1->item.asString.length, pItem2->item.asString.value, pItem2->item.asString.length ); StackPop(); StackPop(); PushLogical( iResult == 0 ? 0 : 1 ); } else { hb_errorRT_BASE(EG_ARG, 1109, NULL, "$"); } } void Less( void ) { double dNumber1, dNumber2; LONG lDate1, lDate2; int i; int iLogical1, iLogical2; if( IS_STRING( stack.pPos - 2 ) && IS_STRING( stack.pPos - 1 ) ) { i = hb_itemStrCmp( stack.pPos - 2, stack.pPos - 1, FALSE ); StackPop(); StackPop(); PushLogical( i < 0 ); } else if( IS_NUMERIC( stack.pPos - 1 ) && IS_NUMERIC( stack.pPos - 2 ) ) { dNumber2 = PopNumber(); dNumber1 = PopNumber(); PushLogical( dNumber1 < dNumber2 ); } else if( IS_DATE( stack.pPos - 1 ) && IS_DATE( stack.pPos - 2 ) ) { lDate2 = PopDate(); lDate1 = PopDate(); PushLogical( lDate1 < lDate2 ); } else if( IS_LOGICAL( stack.pPos - 1 ) && IS_LOGICAL( stack.pPos -2 ) ) { iLogical1 = PopLogical(); iLogical2 = PopLogical(); PushLogical( iLogical1 < iLogical2 ); } else if( IS_OBJECT( stack.pPos - 2 ) && hb_isMessage( stack.pPos - 2, "<" ) ) OperatorCall( stack.pPos - 2, stack.pPos - 1, "<" ); else if( ( stack.pPos - 2 )->type != ( stack.pPos - 1 )->type ) { hb_errorRT_BASE(EG_ARG, 1073, NULL, "<"); } } void LessEqual( void ) { double dNumber1, dNumber2; LONG lDate1, lDate2; int i; int iLogical1, iLogical2; if( IS_STRING( stack.pPos - 2 ) && IS_STRING( stack.pPos - 1 ) ) { i = hb_itemStrCmp( stack.pPos - 2, stack.pPos - 1, FALSE ); StackPop(); StackPop(); PushLogical( i <= 0 ); } else if( IS_NUMERIC( stack.pPos - 1 ) && IS_NUMERIC( stack.pPos - 2 ) ) { dNumber2 = PopNumber(); dNumber1 = PopNumber(); PushLogical( dNumber1 <= dNumber2 ); } else if( IS_DATE( stack.pPos - 1 ) && IS_DATE( stack.pPos - 2 ) ) { lDate2 = PopDate(); lDate1 = PopDate(); PushLogical( lDate1 <= lDate2 ); } else if( IS_LOGICAL( stack.pPos - 1 ) && IS_LOGICAL( stack.pPos -2 ) ) { iLogical1 = PopLogical(); iLogical2 = PopLogical(); PushLogical( iLogical1 <= iLogical2 ); } else if( IS_OBJECT( stack.pPos - 2 ) && hb_isMessage( stack.pPos - 2, "<=" ) ) OperatorCall( stack.pPos - 2, stack.pPos - 1, "<=" ); else if( ( stack.pPos - 2 )->type != ( stack.pPos - 1 )->type ) { hb_errorRT_BASE(EG_ARG, 1074, NULL, "<="); } } void Message( PSYMBOL pSymMsg ) /* sends a message to an object */ { hb_itemCopy( stack.pPos, stack.pPos - 1 ); /* moves the object forward */ hb_itemClear( stack.pPos - 1 ); ( stack.pPos - 1 )->type = IT_SYMBOL; ( stack.pPos - 1 )->item.asSymbol.value = pSymMsg; ( stack.pPos - 1 )->item.asSymbol.stackbase = ( stack.pPos - 1 ) - stack.pItems; StackPush(); HB_DEBUG2( "Message: %s\n", pSymMsg->szName ); } void Negate( void ) { if( IS_INTEGER( stack.pPos - 1 ) ) ( stack.pPos - 1 )->item.asInteger.value = -( stack.pPos - 1 )->item.asInteger.value; else if( IS_LONG( stack.pPos - 1 ) ) ( stack.pPos - 1 )->item.asLong.value = -( stack.pPos - 1 )->item.asLong.value; else if( IS_DOUBLE( stack.pPos - 1 ) ) ( stack.pPos - 1 )->item.asDouble.value = -( stack.pPos - 1 )->item.asDouble.value; } void Not( void ) { PHB_ITEM pItem = stack.pPos - 1; if( IS_LOGICAL( pItem ) ) pItem->item.asLogical.value = ! pItem->item.asLogical.value; else hb_errorRT_BASE(EG_ARG, 1077, NULL, ".NOT."); } void NotEqual( void ) { PHB_ITEM pItem2 = stack.pPos - 1; PHB_ITEM pItem1 = stack.pPos - 2; int i; WORD wDec; if( IS_NIL( pItem1 ) && IS_NIL( pItem2 ) ) { StackDec(); StackDec(); PushLogical( 0 ); } else if ( IS_NIL( pItem1 ) || IS_NIL( pItem2 ) ) { StackPop(); StackPop(); PushLogical( 1 ); /* TOFIX: Is this correct ? */ } else if( IS_STRING( pItem1 ) && IS_STRING( pItem2 ) ) { i = hb_itemStrCmp( pItem1, pItem2, FALSE ); StackPop(); StackPop(); PushLogical( i != 0 ); } else if( IS_NUMERIC( pItem1 ) && IS_NUMERIC( pItem2 ) ) PushLogical( PopDouble( &wDec ) != PopDouble( &wDec ) ); else if( IS_LOGICAL( pItem1 ) && IS_LOGICAL( pItem2 ) ) PushLogical( PopLogical() != PopLogical() ); else if( IS_OBJECT( pItem1 ) && hb_isMessage( pItem1, "!=" ) ) OperatorCall( pItem1, pItem2, "!=" ); else if( pItem1->type != pItem2->type ) { hb_errorRT_BASE(EG_ARG, 1072, NULL, "<>"); } else PushLogical( 1 ); } void Minus( void ) { double dNumber1, dNumber2; long lDate1, lDate2; PHB_ITEM pItem2 = stack.pPos - 1; PHB_ITEM pItem1 = stack.pPos - 2; if( IS_NUMERIC( pItem2 ) && IS_NUMERIC( pItem1 ) ) { WORD wDec2, wDec1; dNumber2 = PopDouble( &wDec2 ); dNumber1 = PopDouble( &wDec1 ); PushNumber( dNumber1 - dNumber2, (wDec1 > wDec2) ? wDec1 : wDec2 ); } else if( IS_DATE( pItem2 ) && IS_DATE( pItem1 ) ) { lDate2 = PopDate(); lDate1 = PopDate(); PushNumber( lDate1 - lDate2, hb_set.HB_SET_DECIMALS ); } else if( IS_NUMERIC( pItem2 ) && IS_DATE( pItem1 ) ) { dNumber2 = PopNumber(); lDate1 = PopDate(); PushDate( lDate1 - dNumber2 ); } else if( IS_STRING( pItem1 ) && IS_STRING( pItem2 ) ) { ULONG ulLen = pItem1->item.asString.length; pItem1->item.asString.value = (char*)hb_xrealloc( pItem1->item.asString.value, pItem1->item.asString.length + pItem2->item.asString.length + 1 ); pItem1->item.asString.length += pItem2->item.asString.length; while( ulLen && pItem1->item.asString.value[ulLen - 1] == ' ' ) { ulLen--; } memcpy( pItem1->item.asString.value + ulLen, pItem2->item.asString.value, pItem2->item.asString.length ); ulLen += pItem2->item.asString.length; memset( pItem1->item.asString.value + ulLen, ' ', pItem1->item.asString.length - ulLen); pItem1->item.asString.value[ pItem1->item.asString.length ] = 0; if( pItem2->item.asString.value ) { hb_xfree( pItem2->item.asString.value ); pItem2->item.asString.value = NULL; } StackPop(); return; } else if( IS_OBJECT( stack.pPos - 2 ) && hb_isMessage( stack.pPos - 2, "-" ) ) OperatorCall( stack.pPos - 2, stack.pPos - 1, "-" ); else hb_errorRT_BASE(EG_ARG, 1082, NULL, "-"); } void Modulus( void ) { WORD wDec1, wDec2; double d2 = PopDouble( &wDec2 ); double d1 = PopDouble( &wDec1 ); /* NOTE: Clipper always returns the result of modulus with the SET number of decimal places. */ PushNumber( fmod( d1, d2 ), hb_set.HB_SET_DECIMALS ); } void Mult( void ) { WORD wDec2, wDec1; double d2 = PopDouble( &wDec2 ); double d1 = PopDouble( &wDec1 ); PushNumber( d1 * d2, wDec1 + wDec2 ); } void OperatorCall( PHB_ITEM pItem1, PHB_ITEM pItem2, char *szSymbol ) { Push( pItem1 ); /* Push object */ Message( hb_GetDynSym( szSymbol )->pSymbol ); /* Push operation */ Push( pItem2 ); /* Push argument */ Function( 1 ); } void Or( void ) { PHB_ITEM pItem2 = stack.pPos - 1; PHB_ITEM pItem1 = stack.pPos - 2; int iResult; if( IS_LOGICAL( pItem1 ) && IS_LOGICAL( pItem2 ) ) { iResult = pItem1->item.asLogical.value || pItem2->item.asLogical.value; StackDec(); stack.pPos->type =IT_NIL; StackDec(); PushLogical( iResult ); } else { hb_errorRT_BASE(EG_ARG, 1079, NULL, ".OR."); } } void Plus( void ) { PHB_ITEM pItem1 = stack.pPos - 2; PHB_ITEM pItem2 = stack.pPos - 1; double dNumber1, dNumber2; long lDate1, lDate2; if( IS_STRING( pItem1 ) && IS_STRING( pItem2 ) ) { pItem1->item.asString.value = (char*)hb_xrealloc( pItem1->item.asString.value, pItem1->item.asString.length + pItem2->item.asString.length + 1 ); memcpy( pItem1->item.asString.value+ pItem1->item.asString.length, pItem2->item.asString.value, pItem2->item.asString.length ); pItem1->item.asString.length += pItem2->item.asString.length; pItem1->item.asString.value[ pItem1->item.asString.length ] = 0; if( pItem2->item.asString.value ) { hb_xfree( pItem2->item.asString.value ); pItem2->item.asString.value = NULL; } StackPop(); return; } else if( IS_NUMERIC( pItem1 ) && IS_NUMERIC( pItem2 ) ) { WORD wDec2, wDec1; dNumber2 = PopDouble( &wDec2 ); dNumber1 = PopDouble( &wDec1 ); PushNumber( dNumber1 + dNumber2, (wDec1>wDec2) ? wDec1 : wDec2 ); } else if( IS_DATE( pItem1 ) && IS_DATE( pItem2 ) ) { lDate2 = PopDate(); lDate1 = PopDate(); PushDate( lDate1 + lDate2 ); } else if( IS_DATE( pItem1 ) && IS_NUMERIC( pItem2 ) ) { WORD wDec; dNumber2 = PopDouble( &wDec ); lDate1 = PopDate(); PushDate( lDate1 + dNumber2 ); } else if( IS_OBJECT( pItem1 ) && hb_isMessage( pItem2, "+" ) ) OperatorCall( pItem1, pItem2, "+" ); else hb_errorRT_BASE( EG_ARG, 1081, NULL, "+" ); HB_DEBUG( "Plus\n" ); } long PopDate( void ) { StackDec(); if( IS_DATE( stack.pPos ) ) { stack.pPos->type =IT_NIL; return stack.pPos->item.asDate.value; } else { printf( "incorrect item value trying to Pop a date value in line %i\n", stack.pBase->item.asSymbol.lineno ); exit( 1 ); return 0; } } double PopDouble( WORD *pwDec ) { double d; StackDec(); switch( stack.pPos->type & ~IT_BYREF ) { case IT_INTEGER: d = stack.pPos->item.asInteger.value; *pwDec =0; break; case IT_LONG: d = stack.pPos->item.asLong.value; *pwDec =0; break; case IT_DOUBLE: d = stack.pPos->item.asDouble.value; *pwDec =stack.pPos->item.asDouble.decimal; break; default: printf( "Incorrect item type trying to Pop a double in line %i\n", stack.pBase->item.asSymbol.lineno ); exit( 1 ); d = 0; } stack.pPos->type =IT_NIL; HB_DEBUG( "PopDouble\n" ); return d; } void PopLocal( SHORT iLocal ) { PHB_ITEM pLocal; StackDec(); if( iLocal >= 0 ) { /* local variable or local parameter */ pLocal = stack.pBase + 1 + iLocal; if( IS_BYREF( pLocal ) ) hb_itemCopy( hb_itemUnRef( pLocal ), stack.pPos ); else hb_itemCopy( pLocal, stack.pPos ); } else /* local variable referenced in a codeblock * stack.pBase+1 points to a codeblock that is currently evaluated */ hb_itemCopy( hb_CodeblockGetVar( stack.pBase + 1, iLocal ), stack.pPos ); hb_itemClear( stack.pPos ); HB_DEBUG( "PopLocal\n" ); } int PopLogical( void ) { StackDec(); if( IS_LOGICAL( stack.pPos ) ) { stack.pPos->type =IT_NIL; return stack.pPos->item.asLogical.value; } else { hb_errorRT_BASE(EG_ARG, 1066, NULL, hb_errorNatDescription(EG_CONDITION)); return 0; } } void PopMemvar( PSYMBOL pSym ) { StackDec(); hb_MemvarSetValue( pSym, stack.pPos ); hb_itemClear( stack.pPos ); HB_DEBUG( "PopMemvar\n" ); } double PopNumber( void ) { PHB_ITEM pItem = stack.pPos - 1; double dNumber; StackDec(); switch( pItem->type & ~IT_BYREF ) { case IT_INTEGER: dNumber = ( double ) pItem->item.asInteger.value; break; case IT_LONG: dNumber = ( double ) pItem->item.asLong.value; break; case IT_DOUBLE: dNumber = pItem->item.asDouble.value; break; default: printf( "Incorrect item on the stack trying to pop a number in line %i\n", stack.pBase->item.asSymbol.lineno ); StackShow(); exit( 1 ); break; } stack.pPos->type =IT_NIL; return dNumber; } void PopParameter( PSYMBOL pSym, BYTE bParam ) { hb_MemvarSetValue( pSym, stack.pBase +1 +bParam ); HB_DEBUG( "PopParameter\n" ); } void PopStatic( WORD wStatic ) { PHB_ITEM pStatic; StackDec(); pStatic = aStatics.item.asArray.value->pItems + stack.iStatics + wStatic - 1; if( IS_BYREF( pStatic ) ) hb_itemCopy( hb_itemUnRef( pStatic ), stack.pPos ); else hb_itemCopy( pStatic, stack.pPos ); hb_itemClear( stack.pPos ); HB_DEBUG( "PopStatic\n" ); } void Power( void ) { WORD wDec1, wDec2; double d2 = PopDouble( &wDec2 ); double d1 = PopDouble( &wDec1 ); /* NOTE: Clipper always returns the result of power with the SET number of decimal places. */ PushNumber( pow( d1, d2 ), hb_set.HB_SET_DECIMALS ); } void PushLogical( int iTrueFalse ) { stack.pPos->type = IT_LOGICAL; stack.pPos->item.asLogical.value = iTrueFalse; StackPush(); HB_DEBUG( "PushLogical\n" ); } void PushLocal( SHORT iLocal ) { if( iLocal >= 0 ) { PHB_ITEM pLocal; /* local variable or local parameter */ pLocal = stack.pBase + 1 + iLocal; if( IS_BYREF( pLocal ) ) hb_itemCopy( stack.pPos, hb_itemUnRef( pLocal ) ); else hb_itemCopy( stack.pPos, pLocal ); } else /* local variable referenced in a codeblock * stack.pBase+1 points to a codeblock that is currently evaluated */ hb_itemCopy( stack.pPos, hb_CodeblockGetVar( stack.pBase + 1, (LONG)iLocal ) ); StackPush(); HB_DEBUG2( "PushLocal %i\n", iLocal ); } void PushLocalByRef( SHORT iLocal ) { stack.pPos->type = IT_BYREF; /* we store its stack offset instead of a pointer to support a dynamic stack */ stack.pPos->item.asRefer.value = iLocal; stack.pPos->item.asRefer.offset = stack.pBase - stack.pItems +1; stack.pPos->item.asRefer.itemsbase = &stack.pItems; StackPush(); HB_DEBUG2( "PushLocalByRef %i\n", iLocal ); } void PushMemvar( PSYMBOL pSym ) { hb_MemvarGetValue( stack.pPos, pSym ); StackPush(); HB_DEBUG( "PushMemvar\n" ); } void PushMemvarByRef( PSYMBOL pSym ) { hb_MemvarGetRefer( stack.pPos, pSym ); StackPush(); HB_DEBUG( "PushMemvar\n" ); } void PushNil( void ) { stack.pPos->type =IT_NIL; StackPush(); HB_DEBUG( "PushNil\n" ); } void PushNumber( double dNumber, WORD wDec ) { if( wDec ) PushDouble( dNumber, wDec ); else if( SHRT_MIN <= dNumber && dNumber <= SHRT_MAX ) PushInteger( dNumber ); else if( LONG_MIN <= dNumber && dNumber <= LONG_MAX ) PushLong( dNumber ); else PushDouble( dNumber, hb_set.HB_SET_DECIMALS ); } void PushStatic( WORD wStatic ) { PHB_ITEM pStatic; pStatic = aStatics.item.asArray.value->pItems + stack.iStatics + wStatic - 1; if( IS_BYREF(pStatic) ) hb_itemCopy( stack.pPos, hb_itemUnRef(pStatic) ); else hb_itemCopy( stack.pPos, pStatic ); StackPush(); HB_DEBUG2( "PushStatic %i\n", wStatic ); } void PushStaticByRef( WORD wStatic ) { stack.pPos->type = IT_BYREF; /* we store the offset instead of a pointer to support a dynamic stack */ stack.pPos->item.asRefer.value = wStatic -1; stack.pPos->item.asRefer.offset = stack.iStatics; stack.pPos->item.asRefer.itemsbase = &aStatics.item.asArray.value->pItems; StackPush(); HB_DEBUG2( "PushStaticByRef %i\n", wStatic ); } void PushString( char * szText, ULONG length ) { char * szTemp = ( char * ) hb_xgrab( length + 1 ); memcpy (szTemp, szText, length); szTemp[ length ] = 0; stack.pPos->type = IT_STRING; stack.pPos->item.asString.length = length; stack.pPos->item.asString.value = szTemp; StackPush(); HB_DEBUG( "PushString\n" ); } void PushSymbol( PSYMBOL pSym ) { stack.pPos->type = IT_SYMBOL; stack.pPos->item.asSymbol.value = pSym; stack.pPos->item.asSymbol.stackbase = stack.pPos - stack.pItems; StackPush(); HB_DEBUG2( "PushSymbol: %s\n", pSym->szName ); } void Push( PHB_ITEM pItem ) { hb_itemCopy( stack.pPos, pItem ); StackPush(); HB_DEBUG( "Push\n" ); } /* +0 -> HB_P_PUSHBLOCK * +1 +2 -> size of codeblock * +3 +4 -> number of expected parameters * +5 +6 -> number of referenced local variables * +7 -> start of table with referenced local variables */ void PushBlock( BYTE * pCode, PSYMBOL pSymbols ) { WORD wLocals; stack.pPos->type = IT_BLOCK; wLocals =pCode[ 5 ] + ( pCode[ 6 ] * 256 ); stack.pPos->item.asBlock.value = hb_CodeblockNew( pCode + 7 + wLocals*2, /* pcode buffer */ wLocals, /* number of referenced local variables */ (WORD *)(pCode +7), /* table with referenced local variables */ pSymbols ); /* store the statics base of function where the codeblock was defined */ stack.pPos->item.asBlock.statics = stack.iStatics; /* store the number of expected parameters */ stack.pPos->item.asBlock.paramcnt = pCode[ 3 ] + ( pCode[ 4 ] * 256 ); /* store the line number where the codeblock was defined */ stack.pPos->item.asBlock.lineno = stack.pBase->item.asSymbol.lineno; StackPush(); HB_DEBUG( "PushBlock\n" ); } void PushDate( LONG lDate ) { stack.pPos->type = IT_DATE; stack.pPos->item.asDate.value = lDate; StackPush(); HB_DEBUG( "PushDate\n" ); } void PushDouble( double dNumber, WORD wDec ) { stack.pPos->type = IT_DOUBLE; stack.pPos->item.asDouble.value = dNumber; if( dNumber >= 10000000000.0 ) stack.pPos->item.asDouble.length = 20; else stack.pPos->item.asDouble.length = 10; stack.pPos->item.asDouble.decimal = (wDec > 9) ? 9 : wDec; StackPush(); HB_DEBUG( "PushDouble\n" ); } void PushInteger( int iNumber ) { stack.pPos->type = IT_INTEGER; stack.pPos->item.asInteger.value = iNumber; stack.pPos->item.asInteger.length = 10; stack.pPos->item.asInteger.decimal = 0; StackPush(); HB_DEBUG( "PushInteger\n" ); } void PushLong( long lNumber ) { stack.pPos->type = IT_LONG; stack.pPos->item.asLong.value = lNumber; stack.pPos->item.asLong.length = 10; stack.pPos->item.asLong.decimal = 0; StackPush(); HB_DEBUG( "PushLong\n" ); } void RetValue( void ) { StackDec(); /* make the last item visible */ hb_itemCopy( &stack.Return, stack.pPos ); /* copy it */ hb_itemClear( stack.pPos ); /* now clear it */ HB_DEBUG( "RetValue\n" ); } void StackPop( void ) { if( --stack.pPos < stack.pItems ) { printf( "runtime error: stack underflow\n" ); exit( 1 ); } if( stack.pPos->type ) hb_itemClear( stack.pPos ); } void StackDec( void ) { if( --stack.pPos < stack.pItems ) { printf( "runtime error: stack underflow\n" ); exit( 1 ); } } void StackFree( void ) { hb_xfree( stack.pItems ); HB_DEBUG( "StackFree\n" ); } void StackPush( void ) { LONG CurrIndex; /* index of current top item */ LONG TopIndex; /* index of the topmost possible item */ CurrIndex = stack.pPos - stack.pItems; TopIndex = stack.wItems - 1; /* enough room for another item ? */ if( !( TopIndex > CurrIndex ) ) { LONG BaseIndex; /* index of stack base */ BaseIndex = stack.pBase - stack.pItems; /* no, make more headroom: */ /* StackShow(); */ stack.pItems = (PHB_ITEM)hb_xrealloc( stack.pItems, sizeof( HB_ITEM ) * ( stack.wItems + STACK_EXPANDHB_ITEMS ) ); /* fix possibly invalid pointers: */ stack.pPos = stack.pItems + CurrIndex; stack.pBase = stack.pItems + BaseIndex; stack.wItems += STACK_EXPANDHB_ITEMS; /* StackShow(); */ } /* now, push it: */ stack.pPos++; stack.pPos->type = IT_NIL; return; } void StackInit( void ) { stack.pItems = ( PHB_ITEM ) hb_xgrab( sizeof( HB_ITEM ) * STACK_INITHB_ITEMS ); stack.pBase = stack.pItems; stack.pPos = stack.pItems; /* points to the first stack item */ stack.wItems = STACK_INITHB_ITEMS; HB_DEBUG( "StackInit\n" ); } void StackShow( void ) { PHB_ITEM p; for( p = stack.pBase; p <= stack.pPos; p++ ) { switch( p->type ) { case IT_NIL: printf( "NIL " ); break; case IT_ARRAY: if( p->item.asArray.value->wClass ) printf( "OBJECT " ); else printf( "ARRAY " ); break; case IT_BLOCK: printf( "BLOCK " ); break; case IT_DATE: printf( "DATE " ); break; case IT_DOUBLE: printf( "DOUBLE " ); break; case IT_LOGICAL: printf( "LOGICAL[%i] ", p->item.asLogical.value ); break; case IT_LONG: printf( "LONG" ); break; case IT_INTEGER: printf( "INTEGER[%i] ", p->item.asInteger.value ); break; case IT_STRING: printf( "STRING " ); break; case IT_SYMBOL: printf( "SYMBOL(%s) ", p->item.asSymbol.value->szName ); break; default: printf( "UNKNOWN[%i] ", p->type ); break; } } printf( "\n" ); } void SFrame( PSYMBOL pSym ) /* sets the statics frame for a function */ { /* _INITSTATICS is now the statics frame. Statics() changed it! */ stack.iStatics = ( int ) pSym->pFunPtr; /* pSym is { "$_INITSTATICS", FS_INIT | FS_EXIT, _INITSTATICS } for each PRG */ HB_DEBUG( "SFrame\n" ); } void Statics( PSYMBOL pSym ) /* initializes the global aStatics array or redimensionates it */ { WORD wStatics = PopNumber(); if( IS_NIL( &aStatics ) ) { pSym->pFunPtr = 0; /* statics frame for this PRG */ hb_arrayNew( &aStatics, wStatics ); } else { pSym->pFunPtr = ( PHB_FUNC )hb_arrayLen( &aStatics ); hb_arraySize( &aStatics, hb_arrayLen( &aStatics ) + wStatics ); } HB_DEBUG2( "Statics %li\n", hb_arrayLen( &aStatics ) ); } void ProcessSymbols( PSYMBOL pModuleSymbols, WORD wModuleSymbols ) /* module symbols initialization */ { PSYMBOLS pNewSymbols, pLastSymbols; WORD w; SYMBOLSCOPE hSymScope; #ifdef HARBOUR_OBJ_GENERATION static int iObjChecked = 0; if( ! iObjChecked ) { iObjChecked = 1; ProcessObjSymbols(); /* to asure Harbour OBJ symbols are processed first */ } #endif pNewSymbols = ( PSYMBOLS ) hb_xgrab( sizeof( SYMBOLS ) ); pNewSymbols->pModuleSymbols = pModuleSymbols; pNewSymbols->wModuleSymbols = wModuleSymbols; pNewSymbols->pNext = 0; pNewSymbols->hScope =0; if( ! pSymbols ) pSymbols = pNewSymbols; else { pLastSymbols = pSymbols; while( pLastSymbols->pNext ) /* locates the latest processed group of symbols */ pLastSymbols = pLastSymbols->pNext; pLastSymbols->pNext = pNewSymbols; } for( w = 0; w < wModuleSymbols; w++ ) /* register each public symbol on the dynamic symbol table */ { hSymScope =( pModuleSymbols + w )->cScope; pNewSymbols->hScope |=hSymScope; if( ( ! pSymStart ) && ( hSymScope == FS_PUBLIC ) ) pSymStart = pModuleSymbols + w; /* first public defined symbol to start execution */ if( (hSymScope == FS_PUBLIC) || (hSymScope & ( FS_MESSAGE | FS_MEMVAR )) ) hb_NewDynSym( pModuleSymbols + w ); } } #ifdef HARBOUR_OBJ_GENERATION void ProcessObjSymbols( void ) { POBJSYMBOLS pObjSymbols = ( POBJSYMBOLS ) &HB_FIRSTSYMBOL; static int iDone = 0; if( ! iDone ) { iDone = 1; while( pObjSymbols < ( POBJSYMBOLS ) ( &HB_LASTSYMBOL - 1 ) ) { ProcessSymbols( pObjSymbols->pSymbols, pObjSymbols->wSymbols ); pObjSymbols++; } } } #endif void ReleaseLocalSymbols( void ) { PSYMBOLS pDestroy; while( pSymbols ) { pDestroy = pSymbols; pSymbols = pSymbols->pNext; hb_xfree( pDestroy ); } } /* This calls all _INITSTATICS functions defined in the application. * We are using a special symbol's scope (FS_INIT | FS_EXIT) to mark * this function. These two bits cannot be marked at the same * time for normal user defined functions. */ void DoInitStatics( void ) { PSYMBOLS pLastSymbols = pSymbols; WORD w; SYMBOLSCOPE scope; do { if( (pLastSymbols->hScope & (FS_INIT | FS_EXIT)) == (FS_INIT | FS_EXIT) ) { for( w = 0; w < pLastSymbols->wModuleSymbols; w++ ) { scope =( pLastSymbols->pModuleSymbols + w )->cScope & (FS_EXIT | FS_INIT); if( scope == (FS_INIT | FS_EXIT) ) { /* _INITSTATICS procedure cannot call any function and it * cannot use any local variable then it is safe to call * this procedure directly * PushSymbol( pLastSymbols->pModuleSymbols + w ); * PushNil(); * Do( 0 ); */ if( ( pLastSymbols->pModuleSymbols + w )->pFunPtr ) ( pLastSymbols->pModuleSymbols + w )->pFunPtr(); } } } pLastSymbols = pLastSymbols->pNext; } while( pLastSymbols ); } void DoExitFunctions( void ) { PSYMBOLS pLastSymbols = pSymbols; WORD w; SYMBOLSCOPE scope; do { if( pLastSymbols->hScope & FS_EXIT ) { /* only if module contains some EXIT functions */ for( w = 0; w < pLastSymbols->wModuleSymbols; w++ ) { scope =( pLastSymbols->pModuleSymbols + w )->cScope & (FS_EXIT | FS_INIT); if( scope == FS_EXIT ) { PushSymbol( pLastSymbols->pModuleSymbols + w ); PushNil(); Do( 0 ); } } } pLastSymbols = pLastSymbols->pNext; } while( pLastSymbols ); } void DoInitFunctions( int argc, char * argv[] ) { PSYMBOLS pLastSymbols = pSymbols; WORD w; SYMBOLSCOPE scope; do { if( pLastSymbols->hScope & FS_INIT ) { /* only if module contains some INIT functions */ for( w = 0; w < pLastSymbols->wModuleSymbols; w++ ) { scope =( pLastSymbols->pModuleSymbols + w )->cScope & (FS_EXIT | FS_INIT); if( scope == FS_INIT ) { int i; PushSymbol( pLastSymbols->pModuleSymbols + w ); PushNil(); for( i = 1; i < argc; i++ ) /* places application parameters on the stack */ PushString( argv[ i ], strlen( argv[ i ] ) ); Do( argc - 1 ); } } } pLastSymbols = pLastSymbols->pNext; } while( pLastSymbols ); } /* ----------------------------- */ /* TODO: Put these to /source/rtl/?.c */ HARBOUR HB_LEN( void ) { PHB_ITEM pItem; if( hb_pcount() ) { pItem = hb_param( 1, IT_ANY ); switch( pItem->type ) { case IT_ARRAY: hb_retnl( pItem->item.asArray.value->ulLen ); break; case IT_STRING: hb_retnl( pItem->item.asString.length ); break; default: hb_errorRT_BASE(EG_ARG, 1111, NULL, "LEN"); break; } } else hb_retni( 0 ); /* QUESTION: Should we raise an error here ? */ } HARBOUR HB_EMPTY(void) { PHB_ITEM pItem = hb_param( 1, IT_ANY ); if( pItem ) { switch( pItem->type & ~IT_BYREF ) { case IT_ARRAY: hb_retl( pItem->item.asArray.value->ulLen == 0 ); break; case IT_STRING: hb_retl( hb_strempty( hb_parc( 1 ), hb_parclen( 1 ) ) ); break; case IT_INTEGER: hb_retl( ! hb_parni( 1 ) ); break; case IT_LONG: hb_retl( ! hb_parnl( 1 ) ); break; case IT_DOUBLE: hb_retl( ! hb_parnd( 1 ) ); break; case IT_DATE: hb_retl( atol( hb_pards( 1 ) ) == 0 ); /* Convert to long */ break; case IT_LOGICAL: hb_retl( ! hb_parl( 1 ) ); break; case IT_BLOCK: hb_retl( FALSE ); break; default: hb_retl( TRUE ); break; } } else hb_retl( TRUE ); } HARBOUR HB_VALTYPE( void ) { PHB_ITEM pItem; if( hb_pcount() ) { pItem = hb_param( 1, IT_ANY ); switch( pItem->type & ~IT_BYREF ) { case IT_ARRAY: if( pItem->item.asArray.value->wClass ) hb_retc( "O" ); /* it is an object */ else hb_retc( "A" ); break; case IT_BLOCK: hb_retc( "B" ); break; case IT_DATE: hb_retc( "D" ); break; case IT_LOGICAL: hb_retc( "L" ); break; case IT_INTEGER: case IT_LONG: case IT_DOUBLE: hb_retc( "N" ); break; case IT_STRING: hb_retc( "C" ); break; case IT_NIL: default: hb_retc( "U" ); break; } } else hb_retc( "U" ); } HARBOUR HB_ERRORBLOCK(void) { HB_ITEM oldError; PHB_ITEM pNewErrorBlock = hb_param( 1, IT_BLOCK ); oldError.type = IT_NIL; hb_itemCopy( &oldError, &errorBlock ); if( pNewErrorBlock ) hb_itemCopy( &errorBlock, pNewErrorBlock ); hb_itemCopy( &stack.Return, &oldError ); hb_itemClear( &oldError ); } HARBOUR HB_PROCNAME(void) { int iLevel = hb_parni( 1 ) + 1; /* we are already inside ProcName() */ PHB_ITEM pBase = stack.pBase; while( ( iLevel-- > 0 ) && pBase != stack.pItems ) pBase = stack.pItems + pBase->item.asSymbol.stackbase; if( ( iLevel == -1 ) ) hb_retc( pBase->item.asSymbol.value->szName ); else hb_retc( "" ); } HARBOUR HB_PROCLINE(void) { int iLevel = hb_parni( 1 ) + 1; /* we are already inside ProcName() */ PHB_ITEM pBase = stack.pBase; while( ( iLevel-- > 0 ) && pBase != stack.pItems ) pBase = stack.pItems + pBase->item.asSymbol.stackbase; if( iLevel == -1 ) hb_retni( pBase->item.asSymbol.lineno ); else hb_retni( 0 ); } HARBOUR HB___QUIT(void) { bQuit = TRUE; } HARBOUR HB_ERRORLEVEL(void) { BYTE bPrevValue = bErrorLevel; if( hb_pcount() > 0 ) /* Only replace the error level if a parameter was passed */ bErrorLevel = hb_parni( 1 ); hb_retni( bPrevValue ); } HARBOUR HB_PCOUNT(void) { PHB_ITEM pBase = stack.pItems + stack.pBase->item.asSymbol.stackbase; WORD wRet = pBase->item.asSymbol.paramcnt; /* Skip current function */ hb_retni( wRet ); } HARBOUR HB_PVALUE(void) /* PValue( ) */ { WORD wParam = hb_parni( 1 ); /* Get parameter */ PHB_ITEM pBase = stack.pItems + stack.pBase->item.asSymbol.stackbase; /* Skip function + self */ if( wParam && wParam <= pBase->item.asSymbol.paramcnt ) /* Valid number */ hb_itemReturn( pBase + 1 + wParam ); else { hb_errorRT_BASE(EG_ARG, 3011, NULL, "PVALUE"); } }